// ============================================================================
//
// Copyright (C) 2006-2007 Dengues
//
// Google Group: http://groups.google.com/group/dengues
// QQ Group: 24885404
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//
// ============================================================================
package org.dengues.designer.ui.process.commands;

import org.dengues.designer.ui.editors.AbstractGEFCommand;
import org.dengues.designer.ui.i18n.Messages;
import org.dengues.designer.ui.process.models.CompNode;
import org.eclipse.draw2d.geometry.Point;
import org.eclipse.draw2d.geometry.Rectangle;
import org.eclipse.gef.RequestConstants;
import org.eclipse.gef.requests.ChangeBoundsRequest;

/**
 * Qiang.Zhang.Adolf@gmail.com class global comment. Detailled comment <br/>
 * 
 * $Id: Dengues.epf 1 2006-09-29 17:06:40Z qiang.zhang $
 * 
 */
public class CompNodeSetConstraintCommand extends AbstractGEFCommand {

    private final ChangeBoundsRequest request;

    private final CompNode node;

    private final Rectangle newBounds;

    private Point oldLocation;

    /**
     * Qiang.Zhang.Adolf@gmail.com CompNodeSetConstraintCommand constructor comment.
     * 
     * @param request
     * @param model
     * @param constraint
     */
    public CompNodeSetConstraintCommand(ChangeBoundsRequest request, CompNode model, Rectangle constraint) {
        if (model == null || request == null || constraint == null) {
            throw new IllegalArgumentException();
        }
        this.request = request;
        this.newBounds = constraint;
        this.node = model;
        setLabel(Messages.getString("CompNodeSetConstraintCommand.move")); //$NON-NLS-1$
        element = node;
        initNewBounds(newBounds);
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.gef.commands.Command#canExecute()
     */
    @Override
    public boolean canExecute() {
        Object type = request.getType();
        boolean b = RequestConstants.REQ_MOVE.equals(type) || RequestConstants.REQ_MOVE_CHILDREN.equals(type);
        b = b && isContainsRect(newBounds);
        return b;
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.gef.commands.Command#execute()
     */
    @Override
    public void execute() {
        oldLocation = node.getLocation();
        node.setLocation(newBounds.getLocation());
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.gef.commands.Command#undo()
     */
    @Override
    public void undo() {
        node.setLocation(oldLocation);
    }

}
